Missing Tecwyn y Tractor episodes

So, you guys may not now this show, but it's the original Welsh version of Tec the Tractor. I'm trying to find the Welsh versions of episodes. Including "Tecwyn Drwg" (Naughty Tec), "Clown", "Plannu Da-Da" (Planting Sweets) and "Meic y Motorbeic" (Mike the Bike). The only times these episodes were shown in Welsh are when they only aired on S4C's morning block "Planed Plant Bach" (Small Children's Planet). There weren't any recordings of these episodes or anything. It seems like everybody who has grown up watching the Welsh version didn't record these episodes on tape or on disc. So, if anyone who has seen the Welsh version, please tell me.